Shape and size that allows for adequate observation, accessibility and ease of operation in restoring the tooth

Principles: self explanatory

2. Define outline form and identify the specific features, with criteria, that address it in the class I occlusal cavity preparation. (Lecture presentations)

Outline form is the general shape and size of the preparation, including all of the various features of the prep.

Outline form itself refers to the general contours of the prep. This means that the outline should be smooth-flowing without ledges and catches. The isthmus must be located on the central groove of the tooth. Outline form also involves the proper placement of the fishtail (around distal cusp) and the dovetail (parallel to marginal ridge)

In class one occlusal preparation, this applies to the following criteria of outline SIZE:

(a) Isthmus: 0.9-1.3 mm (the RGS 6 should NOT be able to fit in the isthmus)

(7) The finished margin should be regular and in the same form as the initial preparation (remember mental image)

(8) Post carve burnishing can produce smoother satin (not shiny) appearance but is only to be used with high-copper amalgams

6. Describe the proper location on a 6” X 6” rubber dam for the hole to be punched for the posterior anchor tooth on an ideal rubber dam application when treating tooth #19. (469-470)

When treating tooth number 19, the anchor tooth will be the third molar (tooth #17, 2 distal to the treated tooth) and it will be extended to the contralateral first premolar (tooth #28).

To determine proper location of the anchor punch you must dived the dam into 3 vertical sections (each 2” width). The proper punch if the anchor tooth were #19 is halfway between the top and bottom edges, right between the left and center vertical thirds, For the third molar, you must move this anchor position towards the inferior border and toward the center of the rubber dam.

Right Position, 9:00facial surfaces of the max and mand right posterior teeth and occlusal surfaces of the mand right posterior teeth

Right Rear, 11:00Most commonly used position, and most parts of the mouth are viewed and accessible. Lingual and occlusal surface of maxillary teeth viewed thru mouth mirror. Direct vision used on mandibular teeth, especially on the left side.

For tooth #19, which is a mandibular posterior tooth on the left side, the 11:00 position is recommended. The patient may have his/her head tilted slightly toward the operator, with height of operating field at approximate elbow height of the operator,

For goofy lefties: the above positions are 5, 3, 1, 12 with all the “rights” switched to “lefts” and vice-versa

6. Describe the proper location on a 6” X 6” rubber dam for the hole to be punched for the posterior anchor tooth on an ideal rubber dam application when treating tooth #20. (pp. 469-470)

REFER TO LECTURE 5 AND THE RUBBER DAM TEMPLATE-#18/#31

When treating tooth number 20, the anchor tooth will be the second molar (tooth #18, 2 distal to the treated tooth) and it will be extended to the contralateral first premolar (tooth #28).

To determine the proper location of the anchor punch you must first divide the dam into 3 vertical sections (each 2” wide) and into two horizontal sections (each 3” wide). When a rubber dam is applied to the mandibular teeth the first hole punched is for the posterior anchor tooth that is to receive the retainer. In this case, again, it would be #18. To determine the proper location, you must be aware that there needs to be enough rubber dam material on the superior border to cover the upper lip. Therefore, you punch the first hole for tooth #18 at 1/4” below the right intersection and 1/4” toward the center. The last hole punched is for the contralateral first premolar, which is tooth #28.